MCP Skills extension (SEP-2640): what Sume's hosted MCP exposes
SEP-2640 serves Agent Skills as skill:// MCP resources. Sume's hosted MCP declares tools only, so skills/list is not a Sume surface; here is what to use.
No, Sume's hosted MCP server does not serve skills over MCP today. SEP-2640 defines a Skills extension where each file of an Agent Skill is an MCP resource under skill://, enumerated by skills/list. The initialize result in the Sume MCP server source on main declares a tools capability with listChanged: false and nothing else, so a client that looks for skill resources will find tools only.
The vendor facts come from the SEP-2640 page (read 2026-10-07): status Final, type Extensions Track, created 2026-04-23. The Sume facts come from the MCP overview and the server source.
Extension against server
The table compares what the extension asks of a server with what Sume ships.
| Topic | SEP-2640 | Sume hosted MCP |
|---|---|---|
| Unit of content | A skill directory with SKILL.md | Tools, listed by tools_list |
| How content is addressed | skill://<skill-path>/<file-path> resources | Tool names such as generate_video |
| Enumeration | skills/list and skills/get | tools_list, tools_schema, catalog_list |
| Declared capability | Resources plus the extension | tools with listChanged: false |
Where the guidance lives instead
Because skills are not served as resources, an agent learns how to use Sume from three places: the server instructions returned at connect time, the tool descriptions in tools_list, and tools_schema for one tool's contract. The discovery tools are read-only, so a mcp:read session can use all of them.
If you want skills today
If your agent can run shell commands, install Sume's guidance as a local skill in the agent's own skills folder. If it cannot, hosted MCP plus the server instructions is the route.
What to expect from clients
The extension is Final, so clients may begin to ask servers for skills. When a host tries skills/list on Sume and gets nothing back, that is expected rather than a failure. Check mcp_health and tools_list to confirm the session itself is healthy.
Sources
Related posts
More in Integrations
- n8n 2.43.0: resume agents after waiting workflows, with Sume runs
n8n 2.43.0 (pre-release, Oct 6) resumes Preview agents after waiting workflows finish. Pair a long Sume run with one webhook, deduped on request_id.
- OpenClaw still lists sora-2 as a configured video provider: fix it
OpenClaw issue 158876: the bundled OpenAI video provider still defaults to sora-2, though /v1/videos returns 404. What to do now, and a Sume video call.
- Plan in Claude Code over MCP, then hand the batch to bulk runs
Use Claude Code with Sume's hosted MCP to prototype one video and read costs, then run the real batch from your backend with Format bulk runs and a spend cap.
- Reels ad: use an existing post or upload a new video? Sume 9:16 file
Meta's Reels ads page offers native video, image ads and existing Reels posts. Which route fits an AI video from Sume, and what file to prepare for each.
Written by Sume